Definition from Wiktionary, the free dictionary
- (US, transitive, intransitive) Of a student, to fail a class; to not pass.
- He flunked math, again.
- (US, transitive) Of a teacher, to deny a student a passing grade.
- Unsatisfied with Fred's progress, the teacher flunked him.
- (US, dated, informal) To shirk (a task or duty).
- To back out through fear.
to deny a passing grade